The Summer Jam at Watkins Glen, N.Y., on July 28, 1973 was once hailed as having the largest audience ever for a pop music festival according to the Guinness Book of World Records. An estimated 600,000 people traveled by car, van or hitchhiked to what was then called Watkins Glen Grand Prix Raceway to see The Band, Allman Brothers Band and the Grateful Dead perform.
Despite drawing more fans than Woodstock, the "one-day blowout at Watkins Glen," the Guardian wrote last year, "has virtually been forgotten."
The concert was organized by promoters Shelly Finkel, 29, and Jim Koplik, 23, and they were largely credited for the day running relatively smoothly.
They began preparations in February, built dirt roads at the Glen, rented 1,000 portable toilets and spent $50,000 to provide concert-goers with 100,000 gallons of spring water.